In a hospital laboratory, a 10.0 mL sample of gastric juice, obtained several hours after a meal, was titrated with 0.1 M NaOH to neutrality; 7.2 mL of NaOH was required. The patient’s stomach contained no ingested food or drink, thus assume that no buffers were present. What was the pH of the gastric juice?

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#Question id: 23572

#Unit 8. Inheritance Biology

Bar mutation is an example of ____

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#Question id: 8853

#Unit 9. Diversity of Life Forms

Which of the following is correctly associated with sponges?

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#Question id: 15717

#Unit 11. Evolution and Behavior

 In The Origin of Species, Darwin propounded two major hypotheses:

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#Question id: 7000

#Unit 5. Developmental Biology

One primary factor in shaping the polarity of the body axes in chick embryos is ________.

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#Question id: 23890

#Unit 13. Methods in Biology

Which of the following is an essential element of plasmids used as cloning vectors?

a. a centromere

b. a telomere

c. an origin of replication

d. a drug resistance gene